scholarly journals Presence of [His7]- corazonin in the central nervous system of a newly isolated albino strain of Schistocerca gregaria (Orthoptera: Acrididae) - mass spectrometric and immunocytochemical evidence

2003 ◽  
Vol 100 (3) ◽  
pp. 455-458 ◽  
Author(s):  
Mazibur M. RAHMAN ◽  
Geert BAGGERMAN ◽  
Liliane SCHOOFS ◽  
Arnold DE LOOF ◽  
Michael BREUER
Keyword(s):  
Central Nervous System ◽  
Nervous System ◽  
Schistocerca Gregaria ◽  
Mass Spectrometric ◽  
The Central Nervous System ◽  
Albino Strain

scholarly journals Respiration in the Desert Locust

1960 ◽  
Vol 37 (2) ◽  
pp. 224-236 ◽  
Author(s):  
P. L. MILLER
Keyword(s):  
Carbon Dioxide ◽  
Central Nervous System ◽  
Nervous System ◽  
Schistocerca Gregaria ◽  
Thoracic Ganglion ◽  
Desert Locust ◽  
Maximum Volume ◽  
Metathoracic Ganglion ◽  
The Central Nervous System

1. Normal (dorso-ventral) and three auxiliary ventilating mechanisms (neck, prothoracic and abdominal longitudinal) are described in the non-flying Schistocerca gregaria. 2. Neck and prothoracic ventilation together contribute 14% of the maximum volume of air pumped by the insect. Head ganglion receptors must be stimulated for these forms to appear. 3. The metathoracic ganglion may contain a pacemaker controlling the frequency and amplitude of all forms of ventilation. Each head and thoracic ganglion contains carbon-dioxide receptors which modify the activity of the pacemaker. There is no control from the abdomen in the intact insect, or from receptors outside the central nervous system. 4. Oscilloscope recordings from the isolated central nervous system demonstrate a rhythm, which is modified and possibly initiated by carbon dioxide. 5. It is suggested that carbon dioxide normally provides a more important ventilatory stimulus than oxygen lack.

scholarly journals Acute and chronic gregarisation are associated with distinct DNA methylation fingerprints in desert locusts

2015 ◽  
Author(s):  
Eamonn B. Mallon ◽  
Harindra E. Amarasinghe ◽  
Swidbert R. Ott
Keyword(s):  
Dna Methylation ◽  
Central Nervous System ◽  
Nervous System ◽  
Schistocerca Gregaria ◽  
Dramatic Form ◽  
Length Polymorphisms ◽  
Amplified Fragment Length Polymorphisms ◽  
Intermediate States ◽  
The Central Nervous System ◽  
Phase Polyphenism

AbstractDesert locusts (Schistocerca gregaria) show a dramatic form of socially induced phenotypic plasticity known as phase polyphenism. In the absence of conspecifics, locusts occur in a shy and cryptic solitarious phase. Crowding with conspecifics drives a behavioural transformation towards gregariousness that occurs within hours and is followed by changes in physiology, colouration and morphology, resulting in the full gregarious phase syndrome. We analysed methylation-sensitive amplified fragment length polymorphisms (MS-AFLP) to compare the effect of acute and chronic crowding on DNA methylation in the central nervous system. We find that crowd-reared and solitary-reared locusts show markedly different neural MS-AFLP fingerprints. However, crowding for a day resulted in neural MS-AFLP fingerprints that were clearly distinct from both crowd-reared and uncrowded solitary-reared locusts. Our results indicate that changes in DNA methylation associated with behavioural gregarisation proceed through intermediate states that are not simply partial realisations of the endpoint states.

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